JPH11254111A - Steel continuous casting equipment provided with deburring device for cut-off burr of slab, bloom and billet - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a steel continuous casting equipment provided with a device having a cylindrical deburring piston and deburring the cut-off burr of a slab, bloom and billet. SOLUTION: Relating to the steel continuous casting equipment provided with the deburring device positioned in direct or subordinate material flow, the deburring device body 3 provided with the deburring piston 4 enabling press-in, is rotated around a working axis 20 vertically stood in line at 0-30 deg. angle to the center line and the perpendicular line to generate the deburring movement. Then, when the press-in deburring piston 4 is brought into contact with a working piece 1, this piston approaches the cut-off burr 2 in the deburring direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a deburring facility, in short, a deburring apparatus, for removing a cutting flash 2 wound by thermochemical longitudinal or transverse cutting of a strand. The deburring device is combined with or installed after the steel continuous casting facility, the deburring device is a cylindrical deburring piston that is located on the rotatably supported deburring body and pushes apart the cutting burr by the rotational movement of the deburring body. Alternatively, it has a tiltable deburring cap.

[0002]

2. Description of the Related Art Particularly during cutting by oxygen in a continuous steel casting facility, more or less large burrs are generated.
At the leading and trailing ends of each work piece 1 for the downflow and partially cooled cutting slag, which are curled at the two lower cutting edges and consist of a mixture of brittle iron oxides, are marked with elastic steel. These cut burrs hang down from the edge like icicles long, the other part forms a relatively flat bulge at the edge of the lower surface of the workpiece, and other types of both There is.
The shape and material composition of all the cutting burrs 2 depend on the casting process and the cutting process. In any case, these burrs are very obstructive to the next step, unless they have already been removed for the next step. Such cutting beam 2
Is most desirable, but this is not feasible. Under certain circumstances, it can be quite small, but without certainty.

Accordingly, there are a number of operating methods and processes in order to remove the cutting flashes as soon as possible after their formation, ie by melting or joining with an oxygen burner, by manual scratching or chiseling. Method by mechanically tapping while rotating a hammer-shaped tool quickly Method by fixing a shaved tool or mechanically shaving while vibrating horizontally Moving a piston-shaped tool linearly One-sided deburring processes mainly show the advantages of high-speed deburring, the same processes as in the case of steam generation, slag splattering, ignition and explosion hazards. It has considerable disadvantages such as granular water requirements. The requirements thus turn to a more mechanical deburring possibility, in which, besides the cost and energy of the mechanical equipment, only considerable time requirements and the removal of the deburred deburr have to be taken into account. A reliable and successfully working deburring device is described in European Patent Specification 901
12027.9. Firstly, the deburring device is applied to an individually operated deburring piston 4, which can be supported on the deburring body 3 and applied to an arched workpiece surface and thus The deburring process is considerably improved. However, this equipment is also costly and requires significant maintenance. Replacing the deburring piston 4 is difficult and time-consuming. In addition, longitudinal and more complex cross-section cutting burrs can be removed at all or only with great difficulty.

[0004] European Patent Application No. 067123
The deburring machine according to No. 0 shows a considerable improvement, because the deburring piston 4 is not individually supplied with high-pressure compressed air, but rather is designed as a tubular body. Because it is supported by. The entire so-called deburring body is pressurized via an air tube, so that all the deburring pistons 4 rise at the same time. With this solution, the pressure is much lower than the first mentioned equipment and the deburring piston 4 is:
It is important that the deburring body 3 is pressed against the lower surface of the workpiece 1 according to its shape using the lifting motion of the deburring body 3 which is effected via a simple lifting cylinder 30 before all the deburring steps. In contrast to the deburring device described above, the deburring piston 4 does not make contact with the flat—meaning a 90 ° angle to the workpiece 1—and because of the slight tilting of the deburring body 3 Contact only at one edge. Thus, the contact pressure and thus the pressure at the deburring body 3 can be considerably reduced. Due to the limited contact of the overhang, it is safe,
Sickle-shaped deburring is achieved without being affected by the possible roughness of the lower surface of the workpiece, so that a minimum shear force is achieved.

[0005] In addition, the design of the deburring piston 4 allows all to be assembled from the same side, which significantly reduces maintenance requirements. Nevertheless, a significant disadvantage still exists in that the machining movement during the deburring operation, which means the relative movement between the deburring device and the workpiece 1, can only be generated in two different ways. .

While permitting a stationary machine and a relatively simple construction, the deburring of the front face of the workpiece in the flow direction requires a time-consuming return movement of the workpiece 1. Otherwise, the deburring device is designed as a mobile installation with the disadvantage of high costs and increasing space requirements. This shows poor applicability of the installation, such as in a multi-strand installation for small dimensions (ie billets). Furthermore, the deburring conditions of strands cut longitudinally in the direction of flow, such that they can be processed only sectionally and not continuously by such machines, result from the fact that they are extremely complex.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to devise a continuous steel casting plant with a device for deburring slabs, blooms and billets.

[0008]

Means for Solving the Problems The object of the present invention is solved by the invention specifying matters described in the claims.

[0009]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is a perspective view of a deburring body according to the present invention; FIG. The central chamber p ₁ (18) is supplied with a compression medium, preferably air, for raising the deburring piston 4.
The air in the lower guide bush 11 is thereby supplied and exhausted via a hole in the deburring piston 4 with a throttle 23 connected for damping the piston movement. According to FIG. 4, the pressure chamber p
It is also possible to form a section ₁ in which the section 24 is welded at the lower end of the deburring body 3 so that the chamber 19 inside the deburring body has an opposing pressure p _{2 at} which the deburring piston 4 can be retracted. It will be used for formation. The rising pressure p ₁ is maintained permanently and is only reduced due to the possible required retraction of the deburring piston 4. In order to generate the required relative movement in the deburring direction between the deburring device and the workpiece 1, the piston body 3 driven by an electric or hydraulic motor 7 is provided with a gear 8 if necessary. With the drive shaft 9, it rotates about its center line 21. The latter includes a base plate 10, a guide bush 11 and a side portion 13.
Is mounted on the upper part of the multi-part machine frame 5 consisting of:

The gear 8 of the drive unit is located on the base plate 10. The guide bush 11 serves for accommodating the main drive shaft 9, which is formed as a hollow shaft, and the piston body bearing 14. The piston body 3 is rigidly connected to the guide bush 11 via a connecting member 15 welded to the drive shaft 9. The supply of the pressure medium is carried out by the hollow shaft 9 and the rotary joint 17 fixed to the lower end thereof.
Done through.

In order to be able to achieve a controlled damping of the rise of the deburring piston 4 with a constant pressure which can be applied via the throttle 23, the piston guide 12 is provided with the deburring piston 4 to be guided and It is designed to form a closed chamber via a slide shoe with a seal.

The deburring body 3 can be designed in a different way, for example as a fan, like a fan, rotating around a body axis 21 as a centrally bent tube. This rotating axis is such that the deburring piston 4 is located for a short time on the workpiece surface at the beginning of the deburring process, and in order to compensate for the height change relative to the workpiece 1, the deburring piston is used for cutting deburring. It must be tilted in such a way that the approach to 2 pushes it back into the deburring body 3. As a result of the permanent air pressure, the deburring piston 4 has a safety ring 24 screwed on a spring 25.
Bounces up from the deburring body 3 after the deburring process until it hits the piston guide 12. Due to the rotation of the deburring body 3 about its inclined axis 21,
The deburring piston 4 moves below the workpiece surface in order to prevent collision with the vertical surface of the workpiece 1 during the return movement. Nevertheless, in order to maintain the right angle between the deburring piston 4 and the workpiece 1 during the deburring process shown in FIG. Can be tilted, but not more than 20 °. The rotational speed of the deburring body 3 must always be adapted to the transport speed of the workpiece 1, so that the remaining part of the cutting burr 2 is a permanent repetition of the single deburring piston 4 with respect to the cutting burr 2. Left between impacts.

The piston diameter, the number of pistons and the pitch circumference of the deburring piston 4 are of course thereby decisive factors. If the deburring piston 4 impacts the cutting burr 2, the deburring piston should not be aligned absolutely at right angles to the workpiece 1, but according to EP-A-0671230, In order to be able to reduce the pressure in the decoy body 3, the contact force and the frictional force due to the equal surface pressure, it should be slightly tilted to an angle of less than 5 °.

Another possibility of designing a rotating deburring motion is described in claim 2 and shown in FIG. The deburring body 3 is rigidly or rotatably mounted on a carriage 6 which can be moved laterally with respect to the cutting burr 2, and the deburring piston 4 with a deburring cap 25 performs the actual deburring process. Is aligned at an angle of 0 ° to 5 ° with respect to the lower surface of the work piece 1. The deburring propulsion is driven by a driving pendulum 26 whose fork-like upper end is driven by the carriage 6 or the axis of the deburring body 3 and is thus driven by a motorized or otherwise driven driving pendulum 26. Instead, a horizontal propulsion is applied. The working axis 20 of the drive pendulum 26 is located outside the actual piston body 3 and the carriage 6 is safely guided horizontally on a slide rail 28. In order to support the drive and balance the deburring stroke acting on the cutting burr 2, the drive pendulum 26
6 may be provided with a swing body 27 at the extended, opposite end. In another method, the design of the deburring body 3, the deburring piston 4 and the deburring cap 25 can be exchanged according to EP 90112027.9, EP 0 712 230.

A third design of the deburring device is described in claim 3 and shown in FIG. The drive pendulum 26
A tangential slide 29 with a lower mounted lifting cylinder 30 fixed together with its motor 7 without the fork end rests on a stationary or movable vertical slide rail 28. A tiltable circular or square deburring tool 31, which is located above the pendulum 26 and below the workpiece 1, is provided.
6 together with the entire lower surface of the work piece 1. In the case of a rotary movement of the deburring tool 31, the deburring tool is pushed back by the lower surface and thus moves tangentially to the smallest circle of the drive pendulum 26.

The small billet is the only one that can only be applied to a limited width because of the circular underside of the wide workpiece 1, with the liftable drive pendulum with the tiltable deburring tool 31. As an exception, the lateral slide of the deburring system must have one deburring path in addition to the other deburring path, which means that the lateral drive, which rotates the drive pendulum 26 as axis, , For example, by a spindle 33. The spindle 33 is held in bearings 34 with the motor 7 on the carriage 6 and seats on the carriage 6, which also serves as a torque support and moves on the base plate 10 of the two U-sections 24. However, the base plate 10 is a height guide for a spindle box bearing 34 which is also located on the lifting cylinder 30.

The deburring body 31 must be tilted forward to prevent the drive pendulum 26 from engaging with the work piece 1 when rotating below the work piece 1; Accordingly, the deburring tool 31 is preloaded via a spring or weight.

Normally, the guide bush 11, the deburring piston 4 rotating inside and the deburring cap 25 are manufactured as separate parts as shown in FIG. 2 and during the final assembly of the operation or during repair or maintenance work Inside put together or put separately. Thereby mainly the deburring cap 25 and then two other parts are
It is considered as a wear part and is manufactured and kept available as cheaply as possible, so that the deburring cap 2
5 is needed in large quantities. In contrast to the above distinctly inexpensive individual parts, the object of the invention produces the deburring cap 25 and the deburring piston 4 as one piece, which is pre-assembled on the guide bush 11. And a holter and a holding ring 32. The required surface, step and bore bolts are screwed together and separately manufactured deburring piston 4 and deburring cap 2
By assembling on top of 5, it would be possible to avoid previously expensive costs. With the solution according to the invention, only the low cost of the components behind the deburring piston 4, for example the screw, and the total product cost for the formation of the screw retaining ring 32 need only be added. The combination of ordinary craftsmanship, such as the loading and unloading of automatic production with the assembly and assembly of these parts, and modern production, as well as cost disadvantages, as well as on-the-fly It is very difficult and costly to carry out these artisan duties during the current downtime.
Alternatively, deburring piston 4 and retaining ring 3
The replacement of the pre-assembled guide bush 11 with the joint 2 is considerably simpler and faster. Factory replacement only with the reusable retaining ring 32 can be done independently of the operation and organically at a favorable price.

[0019]

[Brief description of the drawings]

FIG. 1 is a perspective view of a deburring apparatus according to a first embodiment of the present invention.

FIG. 2 is a sectional view of the deburring apparatus of FIG. 1;

FIG. 3 is an enlarged view showing a driving mechanism of the deburring device of FIG. 2;

FIGS. 4A and 4B show a deburring piston of the deburring device, wherein FIG. 4A is a longitudinal sectional view thereof, and FIG.
It is an enlarged view of the detail of the Y part in the inside, and (c) is an enlarged view of the detail of the X part in the figure (a).

FIG. 5 is a front view showing a second embodiment of a deburring device that performs a rotary deburring motion.

FIG. 6 is a third embodiment of the deburring device;
(A) is its front view and (b) is its side view.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Work piece 2 Cutting burr 3 Deburring main body 4 Deburring piston 20 Working axis

Claims (8)

[Claims] 1. In a continuous steel casting plant with a deburring device located directly or in a dependent material stream, a deburring body (3) with a deburring piston (4) which can be press-fitted has a deburring motion. Rotating about its center line and about the axis of action (20), the deburring piston is vertically aligned at an angle of 0 ° to 30 ° with respect to the vertical and is press-fitted. The said steel continuous casting facility, wherein the deburring piston (4) approaches the cutting burr (2) in the deburring direction when coming into contact with the workpiece (1). 2. A deburring body (3) having a deburring piston (4) which can be press-fitted, in order to generate a deburring movement, a working shaft (2) located outside the drive pendulum (26).
0) along the working circle, with the axis of action (20)
Is located horizontally below the work piece (1) and the deburring body (3) tangentially approaches the cutting flash on a slide (29) on a slide rail (28). Continuous casting plant with deburring device located in the direct or dependent material stream of the plant. 3. A tiltable deburring cap (25) on a drive pendulum (26) with a motor driven horizontal working axis (20) whose height of rotation center is adjustable,
Deburring cap (25) for work piece (1) limit
3. The continuous steel casting plant with a deburring device located in a direct or dependent material stream according to claim 1, wherein the rotary motion of the steel is converted into a tangential approaching motion to the cutting flash (2). 4. The center line (2) of a deburring piston (4).
3. Direct or subordinate material according to claim 2, wherein 2) is tilted into the work piece (1) at the start of the deburring process at a working angle α of less than 5 ° on a surface perpendicular to the cutting burr (2). Continuous steel casting equipment with a deburring device located in the stream. 5. A movable carriage (6) in which the deburring body (3) moves on a stationary frame (5) arranged at an angle β with respect to the work piece (1) or in a longitudinal or lateral direction. A continuous steel casting plant with a deburring device located in the direct or dependent material stream according to claim 1, wherein the deburring device is located in a stream. 6. The or each deburring piston (4), wherein the deburring piston (4) reacts in a damping manner to the first one or retracts the deburring piston (4) as required. move separate second pressure chamber p ₂ (19) medium in a steel continuous casting provided with a deburring device located directly or dependent material flow as claimed in any one of claims 1 to 4 Facility. 7. A deburring piston (4) with a deburring cap (25) can be inserted and removed from one side as a pre-assembled unit with a guide bush (11).
Designed as an indivisible fixed unit,
Steel continuous casting plant with a deburring device located in the direct or subordinate material stream according to any one of claims 1, 2, 4, 5 or 6. 8. The drive mechanism according to claim 2, wherein the vertically movable center of rotation of the drive pendulum is arranged in such a way that the drive pendulum can be moved along the cutting burr. 3. A continuous steel casting plant equipped with a deburring device located in the direct or dependent material stream according to claim 1.